475991 has 2 divisors, whose sum is σ = 475992. Its totient is φ = 475990.

The previous prime is 475973. The next prime is 475997. The reversal of 475991 is 199574.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 475991 - 2⁶ = 475927 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (475997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237995 + 237996.

It is an arithmetic number, because the mean of its divisors is an integer number (237996).

2⁴⁷⁵⁹⁹¹ is an apocalyptic number.

475991 is a deficient number, since it is larger than the sum of its proper divisors (1).

475991 is an equidigital number, since it uses as much as digits as its factorization.

475991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 35.

The square root of 475991 is about 689.9210099714. The cubic root of 475991 is about 78.0787611186.

The spelling of 475991 in words is "four hundred seventy-five thousand, nine hundred ninety-one".